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About Merlin

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    Proto Star
  1. Merlin

    Newtonian cooling fan

    Here's the definitive article on thermal management in a Newtonian: https://www.skyandtelescope.com/wp-contents/uploads/Adler-Newtthermal.pdf
  2. Merlin

    Photographic Atlas Recommendations

    I made my own photographic atlas of the constellations to A4 size - constellation by constellation - from this German website: allthesky.com .
  3. Merlin

    Charity Shop Binos

    The very best secondhand binocular I've had was bought for £18 in a secondhand shop in the 1970s. The glass was in mint condition and had no brand name, only a serial number. The spec was 7X50 with individual focusing on both eyepieces. I sent the serial number to Frank's of Glasgow. They told me that I had a German naval glass. The stars stayed sharp right to the edge of the field.
  4. Merlin

    DIY Refractor

    Yes, baffling. It can make a world of a difference in preventing glare. It's just knowing how to position them correctly in the light cone.
  5. Merlin

    Mak Attack!

    It's surprising that the manufacturer would overlook such a basic necessity as glare reduction. I used some self-adhesive, matt-black, material from WILKO for my SKYMAX 90 baffle tube.
  6. Merlin

    DIY Refractor

    Is there an easy way to work out where the glare stops are positioned?
  7. Merlin

    Charity Shop Binos

    I, too, recently purchased a 12X50 glass ( circa 1970s? ) in mint condition for just £5 on a local flea-market. The black leatherette case also looks new. Usually, bins of this age are plagued with internal fungi, dust and out-of-collimation prisms. There's no brand name on the bins, just a serial number. A lucky find!
  8. Merlin

    A Cheap Huge Worm Gear

    It's good to know that in this age of off-the-shelf products, there are still skilled ATMers ( Amateur Telescope-Makers ) out there.
  9. My Skymaster 70mm bins (15X and 25X ) are stopped down to 63mm at the prisms.
  10. Are the objectives stopped down to 70mm at the prisms?
  11. Merlin


    As much an American icon as the Coke bottle.
  12. Merlin

    Help identifying telescope

    It looks like a ghost of its former self, if you'll pardon the pun.
  13. Merlin

    What Would Be Your Answer To This Question?

    Astronomy is adventurous, romantic and edifying.
  14. Merlin

    Who Makes The Best Binoculars?

    Vladimir Putin is reputed to be the richest man in Europe. If today's "i" is anything to go by, he prefers Zeiss..

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